/usr/lib/python3/dist-packages/ginga/gtkw/ is in python3-ginga 2.6.1-2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python3/dist-packages/ginga/gtkw/GtkHelp.py
/usr/lib/python3/dist-packages/ginga/gtkw/ImageViewCanvasGtk.py
/usr/lib/python3/dist-packages/ginga/gtkw/ImageViewCanvasTypesGtk.py
/usr/lib/python3/dist-packages/ginga/gtkw/ImageViewGtk.py
/usr/lib/python3/dist-packages/ginga/gtkw/Plot.py
/usr/lib/python3/dist-packages/ginga/gtkw/Viewers.py
/usr/lib/python3/dist-packages/ginga/gtkw/Widgets.py
/usr/lib/python3/dist-packages/ginga/gtkw/__init__.py
/usr/lib/python3/dist-packages/ginga/gtkw/gtk_rc
/usr/lib/python3/dist-packages/ginga/gtkw/plugins/
/usr/lib/python3/dist-packages/ginga/gtkw/plugins/WBrowser.py
/usr/lib/python3/dist-packages/ginga/gtkw/plugins/__init__.py
/usr/lib/python3/dist-packages/ginga/gtkw/setup_package.py
/usr/lib/python3/dist-packages/ginga/gtkw/tests/
/usr/lib/python3/dist-packages/ginga/gtkw/tests/__init__.py
/usr/lib/python3/dist-packages/ginga/gtkw/tests/cbar.py